成员变量反射代码报错 - 黑马程序员技术交流社区

package cn.itcast.day01;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
public class ReflectTest {
/**
* @param args
*/
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
String str1 = "abc";
Class cls1 = str1.getClass();
Class cls2 = String.class;
Class cls3 = Class.forName("java.lang.String");
System.out.println(cls1 == cls2);
System.out.println(cls1 == cls2);
System.out.println(cls3 == cls2);
System.out.println(cls1.isPrimitive());
System.out.println(int.class.isPrimitive());
System.out.println(int.class == Integer.class);
System.out.println(int.class == Integer.TYPE);
System.out.println(int[].class.isPrimitive());
System.out.println(int[].class.isArray());
//new String(new StringBuffer("abc"));
Constructor constructor1 = String.class.getConstructor(StringBUffer.class);//该句报错？？？···肿么回事···求解决？
String str2 = (String)constructor1.newInstance(new StringBuffer("abc"));
System.out.println(str2.charAt(2));
ReflectPoint pt1 = new ReflectPoint (3,5);
Field fieldY = pt1.getClass().getField("y");
fieldY.get(pt1);
System.out.println(pt1);
}
}

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